The OPAL Discussion Forum

[John Parrack <jparrack AT g.ucla.edu>]

Hi Joel, no I have not. Thank you. 

Grid size was not on my radar. I see from the documentation that AMR is available in the multi-bunch mode of OPAL-cycl, I'm not sure if that would apply to my EEX beamline simulation. 

If it does and I can use it then I should try to make the grid size smaller to better simulate through the fine structure of the mask element?

  

On Fri, Jul 21, 2023 at 8:23 AM Joel Andersson <joean407 AT gmail.com> wrote:

Hello,

Just out of curiosity, have you tried with different grid sizes to see if there is any correlations between bleeding and grid points?

Best regards

Joel

Den fre 21 juli 2023 17:12John Parrack <jparrack AT g.ucla.edu> skrev:

Hello, I'm having an issue with some of the simulations I'm trying to run and having difficulty resolving it. I was hoping to reach out for help. 

The issue appears to be that when I use certain masks elements, I see bleed through in a particular region. An example is attached below. The masking element contains thin vertical stripes and I've attempted to test many variations on it but this seems to correlate with this bleed through effect in the lower left quadrant just after the masking step. If I use an identical mask without the vertical striping it looks as expected but the vertical striping is an important feature of the simulation.

Would love some direction or guidance towards eliminating this issue. I'm out of ideas. 

--

John Parrack

Particle Beam Physics Lab | Undergraduate Physics | UCLA